Microsoft is in talks with Facebook about investing in the social-networking startup that could value Facebook at $10bn or more, reports the Wall Street Journal, citing people familiar with the matter. The talks set up another likely face-off between tech titans: Google has also expressed strong interest in a possible Facebook investment. If successful, Microsoft’s talks with Facebook could give it a stake of up to 5% in the closely-held startup, potentially valued at roughly $300m-$500m. However, the discussions are still preliminary and Facebook could wind up not taking an investment from either Microsoft or Google.